* {
    margin: 0;
    padding: 0;
}
/*整体样式*/
body {

    background: url("../img/bg1.jpg") no-repeat center center fixed;
    -webkit-background-size: cover;
    -o-background-size: cover;
    background-size: cover;

}
/*最外层盒子*/
.loginbox {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: auto;
    width: 500px;
    height: 360px;
}
/*表单样式*/
form{
    vertical-align: middle;
    /*水平居中*/
    text-align: center;
}
/*表单标题*/
.title{
    color: black;
    font-family: "微软雅黑";
    font-size: 25px;
}
/*输入框样式*/
input{
    background-color: aquamarine;
    width: 340px;
    height: 50px;
    opacity: 0.5;
}
/*按钮样式*/
button{
    width: 100px;
    height: 50px;
}